4results about How to "Data transmission security" patented technology

The invention provides a distributed differential privacy security parameter estimation method and device based on output disturbance, equipment and a storage medium, and relates to the technical field of automatic control and information security. The method comprises the following steps: in each iteration, adding Laplace noise with a fixed scale to output observation data of each agent node for disturbance; respectively adopting a corresponding parameter estimation updating formula according to the known or unknown condition of a target system observation matrix by utilizing the output data after the noise is added and parameter estimation from a neighbor node; the quantitative relation between the privacy parameter and the noise variance and the quantitative relation between the convergence rate and the privacy parameter are given. According to the method, the unknown parameters of the system can be accurately estimated while the output data of each node in the network is protected to meet the differential privacy.

The application relates to a kind of implementation methods of verifiable Internet of Things device data asset transaction, based on the data seller, blockchain and data buyer involved in Internet of Things data asset transaction system, the process for realizing verifiable data asset transaction is as follows: data seller publishes encrypted data on blockchain through smart contract, data buyer requests data according to needs and submits verification request.Smart contract is responsible for verifying the integrity and authenticity of data, and transmits decryption key to data buyer after verification.The data buyer decrypts the data using the key and completes the transaction.If the buyer finds that the decrypted data is abnormal, the smart contract is called to initiate arbitration.Through the confusion encryption mode, RSA accumulator technology, hash verification mechanism and on-chain arbitration mechanism, these attack behaviors are effectively resisted, and the privacy, integrity and verifiability of data transaction are ensured.

The invention discloses a novel size detector control method, which comprises a remote data management server module, a detection terminal gateway module, a size detection execution module and a user operation module, and is characterized in that a safety communication service platform is arranged between the remote data management server module and the detection terminal gateway module; the security communication service platform comprises an application layer, a platform layer, a transmission layer and a communication layer, the application layer provides a detection security plug-in SSDK and a detection task management client, the platform layer is provided with capacity interfaces of detection flow management, data synchronization, task scheduling and the like, the transmission layer is based on the P2P technology, the encryption transmission and routing optimization capacity of detection data is achieved, and the communication layer is used for communication with the detection security plug-in SSDK and the detection task management client. And the communication layer comprises a three-network direct connection data channel and an industrial-grade data private line communication service. According to the invention, through fusion design of a secure communication architecture, intelligent voice interaction, workpiece-face dual verification and a high-precision feature extraction technology, security, intelligence, precision and standardization of a detection process are realized.

The invention relates to the technical field of industrial automation control simulation, and discloses an autonomous and controllable domestic DCS simulation method, which comprises the steps of building a comparison verification platform, selecting a typical industrial scene for analysis, evaluating simulation precision, adjusting model parameters and performing iterative optimization, and optimizing engine scheduling to guarantee real-time performance. According to the method, the modularized simulation model is constructed and comprises the controller, the IO module, the field equipment and the communication link simulation sub-model, and the feedforward compensation amount is introduced, so that the influence of parameter fluctuation on simulation output is effectively counteracted, and the real-time performance and the stability of simulation are remarkably enhanced. Besides, due to integrated application of an independently researched and developed multi-thread parallel resolving engine and a domestic communication chip, bidirectional real-time interaction with DCS hardware is achieved, simulation precision evaluation and model parameter iterative optimization are carried out by building a comparison verification platform and selecting a typical industrial scene, the applicability of a simulation model is improved, and engine scheduling is optimized.